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From reading the Mercedes factory info the 722.6 engages only when the shift is requested (it uses PWM for these solenoids s well) and "ratchets" through the gears rather than speed 1 Solenoid, speed 2 solenoid....... or even a combo. The 1-2 shift solenoid is also used for the 4-5 shift. ...

Lol, well it is a lot on information. I know of two different TCU that were built using Arduinos to control these transmissions, but their prices are outragious! ofgear.dk and i think the other is PCS. I was excited to see you ask the question about "what do we know about Transmission logic&quo...

More Information on how the TCU for my 1999 Mercedes CLK430 controls shifting on the 722.6 5G (5speed) Transmission. Please see pages 5 and 7.

I believe it would be the same for Chrysler vehicles starting from 2001 that carries the 722.6, including Jeep wrangles.

I picked up a slightly smaller clamp today. Still couldnt find one as small as the CA50 here locally. However It is able to test Hz%. I have not had a chance to test fir PWM as yet But i briefly tested the current on 2 of the shift solenoids and saw 0.06A on gear shift 2-3 and 4-5. Dont mark it as o...

Large clamps like that are commonly less accurate than the smaller clamps. I don't know why, but the MFG's seem to think that larger amp numbers is a good thing. However when was the last time you had to read 600 amps. I can't think of a time when I had to read more than 60 amps. Also these larger ...

Shift Solenoid Current Results for the Mercedes, Jaguar and Chrysler 722.6 transmission. Correction. the pic I posted earlier is not my TCU, no wonder I wasnt getting correct readingd. My TCU is located in the cabin on the passenger side foot well. Much better because I was able to look at the meter...

Ok here is a pic of my TCU harness. I now will find the various wires that corresponds to the solenoids.

Great idea!.I can pick one up today.

What about a professional grade diagnostic scanner? I can get my hands on one, so let me know if you'd need me to look into the operations of it that way.

At about 4 ohms, if that's powered by 12V it would be 3A. It appears this would be switched on and off once every say 20 seconds at worst case situation. In this case I would need to see if Frankenso can drive this. It was designed for 1A continuous with continuous switching. The over voltage prote...

Do you have details about the algorithm that would need to happen to control this gear box? Do you have a schematic that shows the low level electrical parts of this gear box? Is it hall or VR, or other for the internal speed sensors? How many amps do the solenoid consume, are they bang bang, or ar...

What do we know about transmission control modules? How complex are these - is this comparable complexity as the ECU, or way easier? I guess I am looking for a 101 on TCM :) I hope im not to late, and I hope this idea for TCU is still hot... I think it would be great if you can create a TCU for the...

Hello Fellow EFiers, Russian... First of all, a special thanks to Andrey for the email reply; you seem to be very humbled. I have taken your advice and has signed up. So I currently own a 1985 Mercedes 380Sl wich I am in the process of literally converting to EFI via Megasquirt Full sequential, VR s...